Atomic Structure

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

True or False? Neutrons have a negative charge

• True
• False

In the modern periodic table elements are arranged by:

• atomic mass
• atomic number
• valence electrons
• number of isotopes

What is the mass number of "F"?

• 9
• 18
• 17
• 19

The first energy level can hold up to how many electrons?

• 8
• 4
• 2
• 5

What are the 3 particles that make-up the atom?

• protons, neutrons, and isotopes
• neutrons, isotopes, and electrons
• positives, negatives, and electrons
• protons, neutrons, and electrons

If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?

• 12 neutrons
• 12 electrons
• 12 protons
• 24 protons and neutrons

What is the mass number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

What element contains 26 protons?

• Iron
• Sodium
• Aluminum
• Helium

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70